20 girls, among whom are A and B, sit down at a round table. The probability that there are 4 girls between A and B is

If x² = y + z, y² = z + x and z² = x + y, then the value of 1/(x+1) + 1/(y+1) + 1/(z+1) is

Reema had 'n' chocolates. She distributed them among 4 children in the ratio of 1/2 : 1/3 : 1/5 : 1/8. If she gave each one a complete chocolate, the minimum number of chocolates she had distributed is

A vegetable vendor by means of his false balance defrauds to the extent of 10% in buying goods and also defrauds to 10% in selling, then the gain percent is

Alpha and Beta are two chemical fertilizers. Alpha consists of N, P, K and Beta consists of N and P. A mixture of Alpha and Beta is prepared in which the ratio of N, P and K is 26%, 68% and 6%. The ratio of N, P, K in Alpha is 20%, 70% and 10%. What is the ratio of N and P in Bet…

There are three bottles of mixture of syrup and water in the ratios 2 : 3, 3 : 4 and 7 : 5. 10 litres of the first and 21 litres of the second bottle are taken. How much quantity of mixture from the third bottle is to be taken so that the final syrup and water ratio of the mixtur…

A man takes 4 hours 20 minutes in walking to a certain place and riding back. If he walks both sides, he loses 1 hour. The time he would take by riding both ways is

In a circus there were a leopard and a tiger walking in two different rings having the same radii. It was observed that when the leopard moved 3 steps, the tiger moved 5 steps in the same time, but the distance traversed by the leopard in 5 steps is equal to the distance traverse…

In a race A, B and C take part. A beats B by 30 metres, B beats C by 20 metres and A beats C by 48 metres. Given below are two statements: Statement I: The length of the race is 300 metres. Statement II: The speeds of A, B and C are in the ratio 50 : 45 : 40. In the light of the…